Have you ever stopped to think about what FX is when you travel abroad? That’s right—the moment you exchange currency at the airport is exactly that: you’re participating in the foreign exchange market, the largest financial market in the world.

Let me give a very simple example. Imagine you’re traveling from Taiwan to the United States. You arrive at the airport and find a currency exchange booth. You have 10,000 Taiwanese dollars (NTD) and you want to exchange them for US dollars (USD). The exchange rate is 0.034, so you leave with 3,400 USD. In this process, you sold your 10,000 NTD and bought dollars—and that’s it, you made a transaction in the mercado forex.

But here’s the interesting part: most of what happens in the foreign exchange market isn’t tourists exchanging currency at the airport. Most of it is traders and speculators buying and selling currencies in the hope of making a profit from the difference in prices. It’s a completely different business from tourism and international trade.

The foreign exchange market is absolutely enormous. To give you an idea, the New York Stock Exchange trades about 200 billion dollars per day. The foreign exchange market? According to data from 2019, it moved 6.6 trillion dollars every day. Yes—trillions. And if you only count the spot market, which is the most relevant part for most participants, it’s still 2 trillion per day. When you think about retail traders like us, the volume is around 3% to 5% of the total—something like 200 to 300 billion per day.

Another really great thing about FX is that it never sleeps. Unlike the stock market or the bond market, the foreign exchange market operates 24 hours a day, 5 days a week. Trading starts when traders wake up in New Zealand, then moves through Sydney, Singapore, Hong Kong, Tokyo, Frankfurt, London, reaches New York, and then goes back to the beginning. It’s a market that’s always in motion, always flowing, because exchange rates change every second.

So basically, once you understand what FX is, you realize you’re looking at a global, decentralized market where currencies from all over the world constantly change hands. It’s not only about travel—it’s about speculation, opportunity, and the continuous movement of capital.